| 摘要 |
PURPOSE:To shorten the rising time of a speed in a high speed range by controlling an inverter in response to the output energy/output frequency characteristic (E/f characteristic) of the inverter with respect to the set rotating speed. CONSTITUTION:A CPU2 outputs data for controlling the speed of a synchronous motor 6 in response to the set value of a speed setter 1. A latch 3 latches the data from the CPU2, and inputs it to a D/A converter 4. The converter 4 converts the data from the CPU2 to an analog voltage, and an inverter 5 inputs the analog voltage as a control voltage to control the frequency of an AC voltage applied to a synchronous motor 6. The CPU2 controls the speed value in response to the E/F characteristics to drive in the state that the rotary torque is maximum. Therefore, the rotating speed of the motor 6 abruptly rises. |
